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Preparation method for graphene/molybdenum disulfide composite material

A composite material, molybdenum disulfide technology, applied in secondary batteries, electrochemical generators, electrical components, etc., can solve the problems of uneconomical post-processing, difficult dispersion, and difficult uniformity of products

Inactive Publication Date: 2014-06-04
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method all uses DMF, and the raw material graphene oxide of hydrothermal synthesis is hydrophilic and not lipophilic, so it is very difficult to disperse in DMF, and the product is difficult to be uniform. Uneconomical

Method used

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  • Preparation method for graphene/molybdenum disulfide composite material
  • Preparation method for graphene/molybdenum disulfide composite material
  • Preparation method for graphene/molybdenum disulfide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Prepare graphene by pyrolysis: commercially purchased melamine and glucose are weighed at a mass ratio of 40:1, put into a mortar and grind for 10 min, then put into a ceramic crucible, seal with graphite, put into a muffle furnace, and Raise the temperature to 450 degrees Celsius (°C) for 1.5 hours (h), then raise the temperature to 850°C for 1 hour, and finally cool to room temperature to obtain graphene in a ceramic crucible. Weigh 40 milligrams (mg) of the graphene obtained above and 200 mg of commercially purchased molybdenum chloride (MoCl 5 ) was dispersed in 20 milliliters (ml) of absolute ethanol, ultrasonicated for 2 hours, then stirred for 10 minutes, and finally vacuum-dried at 60°C for 6 hours, then placed in a square ceramic boat, and the ceramic boat was placed in a horizontal tube furnace with a length of 90cm In the middle part, weigh 0.5 grams (g) of sulfur powder and place it in another square ceramic boat, and place the ark at 18 cm from the argo...

Embodiment 2

[0013] The preparation method of graphene is the same as that in Example 1. Weigh 40mg of graphene and 200mg of molybdenum chloride and disperse them in 20ml of absolute ethanol, first ultrasonically for 2h, then stir for 10min, and finally place them in a square ceramic boat after vacuum drying at 60°C for 6h. And place the ceramic boat in the middle of a horizontal tube furnace with a length of 90 cm, weigh 0.5 g of sulfur powder and place it in another square ceramic boat, and place the ark at 18 cm from the argon inlet of the horizontal tube furnace. After sealing the horizontal tube furnace, evacuate to 10 -4 MPa, the argon flow rate is kept at 50 sccm while maintaining the low pressure condition, the temperature is raised to 750°C, and the temperature is maintained for 30 minutes, and finally cooled to room temperature naturally under the protection of argon, and the obtained product is collected in a ceramic boat carrying graphene and molybdenum chloride .

Embodiment 3

[0015] The preparation method of graphene is the same as that in Example 1. Weigh 40mg of graphene and 200mg of molybdenum chloride and disperse them in 20ml of absolute ethanol, first ultrasonically for 2h, then stir for 10min, and finally place them in a square ceramic boat after vacuum drying at 60°C for 6h. And place the ceramic boat in the middle of a horizontal tube furnace with a length of 90 cm, weigh 0.5 g of sulfur powder and place it in another square ceramic boat, and place the ark at 18 cm from the argon inlet of the horizontal tube furnace. After sealing the horizontal tube furnace, evacuate to 10 -4 MPa, the argon flow rate is kept at 50 sccm while maintaining the low pressure condition, the temperature is raised to 800°C, and the temperature is maintained for 30 minutes, and finally cooled to room temperature naturally under the protection of argon, and the obtained product is collected in a ceramic boat carrying graphene and molybdenum chloride .

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Abstract

The invention aims to provide a novel method for preparing a lot of graphene / molybdenum disulfide composite materials. The method comprises the specific steps: (1) preparing commercially-purchased glucose and melamine taken as raw materials into graphene by a high-temperature cracking method; (2) dispersing the graphene prepared by the step (1) and commercially-purchased molybdenum chloride (MoCl5) into absolute ethyl alcohol; carrying out ultrasonic treatment, agitating and drying in vacuum; then grinding to obtain a mixed raw material; putting the mixed raw material into a square ceramic boat and putting the ceramic boat into a middle part of a horizontal pipe type furnace with the length of 90cm; weighing a certain amount of sulfur powder and putting the sulfur powder into the other square ceramic boat; putting the square boat into a 18cm part of an argon inlet of the horizontal pipe type furnace; sealing the horizontal pipe type furnace and vacuumizing to 10<-4>MPa; introducing argon with a certain flow speed and keeping a low-pressure condition; raising the temperature to a pre-set temperature and keeping the heat for 30 minutes; and finally, naturally cooling to the room temperature under the protection of the argon and collecting an obtained product in the ceramic boat for containing the mixed raw material.

Description

technical field [0001] The invention relates to the fields of novel chemical power sources and new energy materials, and specifically discloses a preparation method of a graphene / molybdenum disulfide composite material. Background technique [0002] High-energy batteries are one of the requirements for sustainable development. Compared with other secondary batteries, lithium-ion batteries have the advantages of high working voltage, high specific energy, good safety, and no memory. Since the beginning of the 21st century, environmental pollution and energy shortages have become more and more serious. It is urgent to develop and utilize various fuel cells and high-energy batteries. Among them, the development of electric vehicles is a top priority. The key to electric vehicles lies in batteries, and lithium-ion batteries are considered It can best satisfy the advantages of the future social effect, small self-discharge, and no environmental pollution. In recent years, lithi...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62
CPCH01M4/364H01M4/5815H01M4/625H01M10/0525Y02E60/10
Inventor 简基康王丰超吴荣
Owner XINJIANG UNIVERSITY
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